the faa is investigating the cause of the crash. >>> it's been one of the worst days for the stock market this year. [ closing bell ] >> underwhelming corporate earnings reports are rattling investors' nerves. dupont, 3m, u.p.s., did not meet their revenue expectations. the dow fell to its lowest in four months. it sank 243 points. the nasdaq also fell 26.5 points. the s&p finished down almost 21 points. >>> seeing numbers drop on the board may be bad on wall street but when it's at a gas station, that's a different story. here in the bay area, some gas stations have seen a 20-cent drop just in the past week. cbs 5 reporter ann notarangelo with why prices are expected to keep going down. ann. >> reporter: elizabeth, people have been lining up on willow pass road all day in concord and get gas here at $3.39 a gallon. aaa says gas prices are going down about 20 cents in the past week. i wish it came down as fast as it went up. that was unbelievable. >>> reporter: in early october california's average prices some places topped $5 but that pain at the pump is easing. last week drivers were pa